.f{
    background-color:yellow;
    /*  margin:50px; */
    border:10px solid pink;
    /*   padding:20px; */
    width:300px;
    height:200px;
    position:absolute;
    /* bottom:50px;
    left:50px; */
    /*  line-height:30px; */

}
.e{
    background-color:green;
    width:200px;
    height:100px;
    position:absolute;
    bottom:0px;
   left:10px;
}
*{
    margin:0px;
    padding:0px;
}

.a{height:50px;
    background-color:pink;
}
.a li{
    list-style:none;
    float:left;
    height:50px;
    line-height:50px;
    margin-right:50px;
}